# Personalization

The configuration of OntoGuiWeb can be customised by setting a configuration json file with a specific [schema](#schema). The configuration file can be selected by specifying the [URL parameter](https://virtualfactory.gitbook.io/vlft/tools/ontoguiweb/..#url-parameters) `config`.

## Schema

The app configuration is defined in a .json file according to a schema with the following root properties:

* "**endpoint**": definition of the SPARQL endpoint to query/update an ontology. Its properties are:
  * "**server**": address of the server 
  * "**database**": name of the database
  * "**user**": user
  * "**psw**": password
* **"sparqlDir**": repository of the SPARQL query/update templates
* "**VEApp**": configuration of the [Virtual Environment App](https://virtualfactory.gitbook.io/vlft/tools/ontoguiweb/modules/virtual-environment) that can be launched by OntoGuiWeb. Its properties are:
  * "**url**": address of the web application
  * "**repoMod3d**": repository of 3D models 
  * "**repoAnim**": repository of the animation sequences
  * "**inputbase**": base URL for input [animation](#animation), [environment](#environment), and [configuration](#undefined) json files
* "**MQTT**": definition of MQTT communication settings
  * "**broker**": URL of the broker
  * "**sub\_base\_topic**": base topic (that is customized with the addition of the graph name) for MQTT subscriptions
  * "**pub\_base\_topic**": base topic (that is customized with the addition of the graph name) for MQTT publishing
  * "**QoS**": quality of service (0, 1, 2)